Video Block Diagram - JVC HR-S6850MS Service Manual

4.26

VIDEO BLOCK DIAGRAM

8 7 S-P CONVERTER
VR1601
Q1607-
IC1607 R-Y LEVEL IC1606 IC1605
ADJ Q1609
1
11 16 9
R-Y AMP R-Y R-Y R-Y 16
14 CVBS
14 12 10
B-Y B-Y
C OUT B-Y
Q1614
3
B-Y MULTI
AMP
5
COLOR
DL
BUF DECODER
PAL
Q1610-
ENCODER VR1602
Q1612
B-Y LEVEL
24 ADJ
C
IC1601-
IC1604
Q1601
SYNC
BUF
SEP.
Q1605
EQ BUF
0 6 TERMINAL(S-SUB)
4
C
+
42 41 40 39 38
CR
ADJ CLK DATA
IIC LOGIC
PRE LPF
3
43 PB
CLAMP
REC
PRE LPF ATT
DIGI/PB
EXT PB Y
45
PRE LPF DIGI
47
C C
PRE LPF
48 EXT PB C
C
PB
EXT PB C
49
C 50
51
ATT
CLAMP
2
52
53
GCL
V5
COMP IN
REC
54
Y
AGC
V3/V4
Y/C IN
PB
AGC DET
56 S.SEP
Y
Y
Y1
ATT ATT
IC501
( Y/C )
SWITCH 1 2 3 4 5
NOT
USED
1
Note : For the waveforms in this block diagram, refer to page 4-41.
A B
( Y/C SEP & MIX )
IC1401
REC
WF1
PS com/CNR
PB
WF2
CN1601
TO_PS_C
9 REC
3L COMB
FROM_PS_C
7
Y COMB
TO_PS_Y PB
Y
5
REC PB
FROM_PS_Y
3
WF3
29
31 24
Y
WF4
Q1417
BPF
BUF
CN511
3 5 7 9
Y
C
C
Y
C
Y
Y
C
36 34 33 32 31 30 29
SP/EP(LP)
EE/PB
VHS
CLAMP
S-VHS
CONV
DIGI/PB REC 28
PB
REC CONV PB
DIGI
REC 27
PB*CONV N/S-LPF
CLAMP
EQ
PB REC
Y
25
CLAMP
CONV
CONV 24
VCA
REC
PB*CONV
23
FILTER FILTER
REC
21
N.C.
ATT CLAMP
REC PB
TRAP
20
19
V FBC V MUTE
BB
PB*D15
C.K.
D7&D8 18
NOT
BB BIAS
BB
USED
V4
17
BB C
C MUTE
V3
C1 C3 D16
C2
Y FBC
15
Y
Y MUTE
S1/S2 DET
Y3
Y2
ATT ATT ATT
6 7 8 9 10 11 12 14
NOT NOT NOT
NOT
USED USED USED USED
C D
(Only used for HR-S8850MS)
0 5 3D/TBC(2M)
7
DFFI
8
VR
11 Q1419
ES
SDATA
12
SCLK
17
BPF BUF
COUT
Q1402
ES
Q1404
Q1406
19 CN1401
LPF BUF
D.FF
YOUT
15 1
V.REF
Q1414 14 2
I2C_DATA
12 3
ES
I2C_CLK
21 VR1401 11 4
C_FROM_DIGI
VREF
D/A LEVEL ADJ
9 5
Y_FROM_DIGI
7 6
EE(L)
6 7
Q1418 Y V/Y_TO_DIGI
LPF BUF 5 8
C C_TO_DIGI
9
3
Fsc
10
1
IC502
( S-VHS & SVHS-ET SWITCH )
1
18
EQ
SP
2
17
SP
EE(L)
EQ
16
REC PB
5 12
NON LINEAR
PROCESSOR
PB
6
11
EQ
SP
REC
10
SP
EQ
HR-S7850MS
HR-S7851MS
HR-S8850MS
E
4-49 4-50
(Only used for HR-S6850MS/S7850MS/S7851MS)
0 5 2D DIGITAL
IC1201 ( MIX )
Y/C SEP &
34
IIC_DATA
35
IIC_CLK
REC
41
COUT
BUF
BPF
PS com/CNR
Q1202
PB
REC
44
3L COMB YOUT
LPF BUF
Y COMB
PB Q1203
CN1201
REC PB
VR1201 12
40
VREF
D/A LEVEL ADJ
11
9
7
19 10 5
Q1205
Y
Y
BUF 5
Q1206
C C
BPF
BUF 3
1
HR-S8850MS
CN911
3
2
1
Y
5
Y
7
C
9
CN915
1
C
9
Y
7
Y
5
C
3
CN912
C
3
12
C
1
4
Y
5
6
7
9
10
C
Y
C
Y
F G
I2C_DATA_A/V
3
I2C_CLK_A/V
4
C_FROM_DIGI
5
Y_FROM_DIGI
6
V/Y_TO_DIGI
8
C_TO_DIGI
9
Fsc
10
EE(L)
11
I2C_DATA
12
I2C_CLK
13
Y_TO_AV
14
V_FROM_AV
15
REC_COLOR
16
Fsc
17
C_TO_DIGI
18
Y/V_TO_DIGI
19
Y_FROM_DIGI
20
C_FROM_DIGI
21
SECAM_PB_COLOR
22
V_FROM_OSD
23
PB_COLOR
24
MAIN_ALC_DET
25
Y_TO_SUB
26
P.MUTE(L)
27
FRONT_V_IN
28
V_TO_OSD
29
CHARA_DATA
30
FRONT_Y_IN
31
FRONT_C_IN
32
V_FROM_OSD
33
C_OUT
34
Y_OUT
35
REAR2_C_IN
36
REAR2_Y_IN
37
REAR1_C_IN
38
REAR1_Y_IN
39
H